Multifeed pump



July 30,` l929 E. M. scovlLLE MULT I FEED PUMP Filed Oct. 1, 1925 5 Sheets-Sheet July 30, 1929- E. M. scovlLLE l MULTIFEED kPUMP Filed oct. 1.11925 July 3d, 1929. E. M. scovlLLE MULTIFEED PUMP f Filed Oct. 1, 1925 5 Sheets-Sheet Patented .uly 30, 1929.

Aralar oFFrcE.

EUGENE M. SCOVILLE, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE-HALF T0 FLOYD L. SWANBERG, OF PITTSBURGH, PENNSYLVANIA. Y

MULTIFEED PUMP.

Application filed. October 1, 1925. Serial No. 59,766.

This invention r'elates in general to improvements in the art of' fluid distribution, and relates more specifically to improvements in the construction and operation` of multiple feed. pumps for delivering liquids such as oil -in regulated quantities to a plurality of distribution lines or pipes.

An object of the invention is to provide improved pumping mechanism which is simple in construction. and efficient in operation.

Some of themor'e specific objects of the present improvement are as follows To provide an improved multi-feed lubricator which is extremely compact in structure, and which is capable of automatically delivering accurately measured quantities of lubricant to a plurality of sources of utilization.

To provide an improved pump having several discharge lines, and means whereby the quantity of fluiddelivered to any one of the discharge lines may be varied independently of the others.

To provide pumping mechanism comprising a capacity determining pump and a final discharge pump operating in; series and controllable to alter the characteristics of the discharge, during normal operation of the mechanism. Y Y To provide a durable pump all parts of which are conveniently accessible for inspection and adjustment, and in which the actual conditions of operation are plainly visible at all times.

To provide other improvements in the details of construction and operation of fluid pumping and distributing mechanisms whereby the cost of construction thereof is reduced to a minimum and the efliciency is enhanced to a maximum. A

Some of the novel features of pump and pump drive construction, disclosed but not specifically claimed herein, form the subject of copending applications Serial No. 567,- 064, led J une 9, 1922, and. Serial No. 589,- 748, filed September 22, 1922.

A' clear conception of the various novelfeatures of the presentimprovement and of the operation of devices constructed m. ac-

cordance with the invention, may be had by referring to the drawings accompanying and forming av part of this specification, in which like reference characters designate the same or similar parts in the various views.

Fig. 1 is a. transverse vertical section through an improved multi-feed lubricator, the section being taken along the irregular line A,*A of Fig. 3.

Fig. 2 is a side elevation of the multifeed lubricator, a portion of the main casing having been broken away in order to more clearly disclose internal structure.

Fig. 3 is a partial top View of the multifeed lubricatoi, some of the parts having been removed for the sake of clearness.

The improved multi-feed lubricator specifically illustrated in the drawing comprises generally a main casing 2 forming an oil supply chamber 45; a sheet metal cover 18 enclosing the top of the casing 2; a pump frame 7 detachably associa-ted withfthe cover and having a vertical taperedbore 33 formed centrally therein; an intermittently rotatable pump cylinder 6 coacting with the bore 33 of the frame 7; a two diameter pump plunger 5 reciprocable within the cylinder 6 and cooperable with the cylinder interior to form upper and 80 lower displacement chambers 29, 22; mechanism including horizontal drive shaft 3 supported in combined stuliing boxes and bearings 48, 49 associated with the casing 2, for rotating the cylinder 6 and for recipro- 85 eating the plunger 5; and a plurality of independent feed pipes or lines 8 communicating with conduits 30` formed in the frame 7.

rlhe main casing 2 is provided with a gu upper end of the vcasing 2, and besides providing a direct support for the frame 7, the cover 18 also supports the strainer 46 and the auxiliary cover 53.

-The pump frame 7 is provided with an annularv series of-eight recesses 43 surrounding the tapered'bore 33 therein, and also has two series of segregatedl conduits 30, 24 formed therein. Theconduits 30 of the one series have their inner ends connected to the,

adjacent recesses 43, and have their outer ends screw-threaded to receive coupling elements 32 which connect the pipe lines 8 to the top of the frame 7. The conduits 24 are variable in `cross-sectional area by virtue of flow control needles 17 having screw-thread coaction with the frame 7 and which are adjustable from the exterior of the mechanism. The intermittently rotatable' pump cylinder 6 has a central through bore'o two diameters, the upper extremity of which is sealed by means of a stem or plug 55having a central passage 26 therein.

' 27-which is secured tothe upper end of the plug 55 and extends laterally therefrom, has a centrall passage communicating with the plug passage 26 and formed to deliver liquid vdownwardly and centrally toward the successive recesses 43 during intermittent rotation of the pump cylinder. A retaining collar or ring 34 secured tothe plug 55 adjacent to the upper end 'of thel cylinder 6, coacts with the upper surface of the frame 7. A transparent lbell-shaped cap 9 normally encloses the plug 55, nozzle'27 andthe recesses 43, the cap 9 being'detachably retained proper-position by means of oppositely tent rotation of the cylinder.

The vertically reciprocable pump plunger 5 has an upper end of yreduced diameter cooperating with the cylinder 6 and with the plug 55 to Jform the upper displacement chamber 29, and has a medial shoulder" co-` operating with theinner surfaces of the cyl-v inder 6 toform the lowerannular displacement chamber' 22.Y A conduit 21 formed within the lower portion of the plunger V5 communicates at its upper end `directly with the Vdisplacement chamber 22, and has its ,lower end in open communication with the suction pipe 54. AThe suction pipe54`is attached to the lower lenlarged extremity 40 A nozzlev of the plunger 5, and carries a strainer 4l at its lower end. A plunger retainer 19 secured to the frame 7 coacts with the opposite sides of the pipe 54 to positively prevent rotation of the plunger 5 about its central axis, while permitting free verticalrecipro cation ot the plunger 5. A helicalcomprcs sion spring 20 embracing the lower portion pf the rotary cylinderw6 coacts withthe enlarged vplunger extremity 40 and with an enlargement at the medial portion of the @cylinder 6, this springl at all times exerting an upward pressure against the cylinder 6 and forcing the same into the taperedbore 33 of the frame 7, and simultaneously exerting a `downward pressurel upon the plunger 5. f

The' flow of fluid through the improved pumping mechanism is controllable by means of a series of spring pressed ball valves each of which is conveniently removable. The suction valve A12 disposed within the strainer 41- controls the admission of oil from the chamber 45 to the lower displacement chamber 22 through the pipe 54 and the conduit 21.V rThe 'discharge valve 13 mounted within the cylinder 6 controls the Vdelivery of oil from the chamber 22 to the conduit 23 and to the return or by-pass valve 14 which is disposed within a fitting 44 carried by the cylinder 6. A suction valve 15 disposed in each of the conduits 3()v directly belowits corresponding recess 43, controls the com# munication between the recesses 43 and the upper displacementv chamber 29 through the port 28 in the cylinder 6. A final discharge valve 16 disposed in each of the conduits 30 beyond the valve 15 therein, controls the delivery of oil to the corresponding pipe line 8. It 'will be noted that the valvesA 13, 14, 15,

16 may be of identical construction thus making" them interchangeable. l The mechanism for intermittently rotating the cylinder- 6 about the reciprocatingk plunger 5 comprises a toothed element 10v detachably secured tothe medial enlarged portionof the cylinder 6 by means of screws 35, and an actuator arm 11 secured to the drive shaft 3 and intermittently engageable with the successive teeth of the elementlO. The mechanism for reciprocating the pump plunger 5 'within the cylinder 6 comprises an actuating cam 4 secured to the drive shaft g 3 adjacent to the arm V11 and'engageable with'the lower enlargement 40 of the plunger 5. The portion of ythe shaft 3 within the casing 2 and adjacent to the end of the hub ofthe arm 11 is embraced by a sleeve 50 for preventing end displacement of the armA 11 and of the cam 4. vOne end of the shaft V3A may be provided with a crank 51 or other means for imparting continuous'rotary motion to the shaft 3. The opposite end of theV shaft 3 may be provided with a lever 52 or other means for imparting intermittent oscillatory motion to a paw147 which is rotatable about the shaft 3. The paWl 47 is engageable with side teeth ofy a ratchet wheel 36 which is attached to the shaft 3 directly adjacent to the cam 4. Reverse rotationof the ratchet wheelr36 and of the shaft 3 is prevented by a leaf spring 37 which is engageable with peripheral teeth or the wheel 36. y During normal operation of the multifeed lubricator, the drive shaft 3, cam 4 and arm 11 may be rotated continuously by means of the crank 51 or the lever 52, or intermittently by oscillating the lever 52, thereby causing simultaneous reciprocation of the plunger 5 and intermittent rotation of the cylinder 6 and of the elements carried thereby. AVihen the plunger 5 moves` downwardly, the displacement chambers 22, 29 are enlarged thus causing the suction valve 12 to open and to admit a definite quant-ity of oil from the chamber 45 to the conduit 21 and chamber 22, and also causing one of the suction valves 15 to open and to admit a deti- Vnite quantity of oil from the corresponding recess 43 to the corresponding conduit 30 in advance of the final discharge valve 1G therein. `As the plunger 5 is forced upwardly by the advancing cam 4, the excess oil previously drawn into the chamber 22 is forced past the valve 13 and a portion of the displaced oil is urged through the conduits 23, 24 and one set of the passages 25, 26 to one of the recesses 43, while the excess oil Which is not permitted to traverse such course by virtue of the setting ot' the corresponding needle 17, is returned directly to the supply chamber 45 past the by-pass valve 14 in the fitting 44. Simultaneously with such displacement of the oil by the lower portion of the plunger 5, the upper end of the rising plunger 5 acts upon the oil filled chamber. 29, port 28 and conduit 30 and forces a definite quantity of the Acontined oil past the corresponding` linal discharge valve 16 into one of the distribution lines 8. After one complete reciprocation of the plunger 5 has been thus completed, the arm 11 secured to the rotating shaft 3, becomes effective to produce partial rotation ot' the cylinder 6 through one eighth of a circle, whereupon the plunger 5 is again reciprocated to repeat the cycle and to torce a predetermined quantit-y of oil into the next feed line 8. 1t will be apparent that as the rotation of the shaft 3 continues, the plunger 5 is intermittently reciprocated and the cylinder 6 is alternately intermittently rotated through an eighth ot a revolution, and the various elements automatically function to deliver accurate quantities of oil to each oi the distribution lines 8 in succession.

Y 1f it is i'oiui'd desirable to vary the quantity of oil which is delivered to any one of the lines 8, such variation may be quicklyI eilected byV adjusting the corresponding needle 17. By entirely closing one or more of the conduits 24 with the aid of the needles 17 therein, the delivery of oil to the corresponding lilies 8 may be entirely stopped. lVhen the conduits 24 are thus closed off, all of the oil displaced from the lower chamber 22 is returned directly to the supply chamber 45 past the by-pass valve 14.

The operation oi" the apparatus is plainly visible at all times by virtue of the transparent cover 9 and of the gage 38. The cover 9 may be quickly removed to permit access to the recesses 43, the plug 55 and the nozzle 2T, by merely urging the springs 31 away from the tapered projections on the cover 9 and these projections assure tight closure of the cover 9. The pipe lines 8 may be disconnected from the trame 7 at will by releasing the couplings 32 and the entire frame 7 and the elements carried Ythereby are readily removable from the cover plate 18 and from within the casing 2 Without di'sturbing the driving mechanism. Vhen the frame 7 is removed trom the cover plate 18, the plunger 5 and the spring 20 are freely removable from the cylinder 6. Upon removal of the nozzle 27 and the retaining collar 34, the cylinder G is freely removable from within the bore ot the trame 7, thus permitting rapid disn'iantling of the entire structure.

lt will also be observed that while the cylinder 6 is rotatably about its longitudinal aXis, it is normally prevented from moving` along its axis by the spring 2O. The plunger 5 which is reciprocable within the cylinder 6 by the spring 2() and the cam`4, positively prevented from rotating about the cylinder axis bynieans ot thc element 19. lVhile the invention has been illustrated as being applied to an eight feed structure, it is obviously capable of aliplication to mechanisms having any number ott feeds.

1t should be understood that it is not desired to limit the invention to the exact details oll construction and operation herein shown and described for various modifications within the scope of the claims may occur to persons skilled in the art.

ItA is claimed anddesired to secure by Letters latentz* 1. in combination, a frame having bore and a plurality of independent lluid distributing ports terminating directly at said bore, a cylinder rotatably associated with said bore and having a port formed to establish direct and independent communication between the interior ot said cylinder and said frame ports in succession, a plunger reciprocable within said cylinder, and means for moving said plunger relative to said cylinder only while the latter at rest and when saidV cylinder port is in full open communication with one of said frame ports.

2. In combination, a frame v having a tapered bore and aplurality of independent fluid distributing ports radiating from and terminating directl at said bore, a cylinder rotatably associated7 with said bore and having a radial through port formed to establish direct and independent communication betweenthe interior 0I" said cylinder and said frame ports in succession, a plunger reciprocable within said cylinder, means for moving saidvpl'unger in one direction and for simultaneously urging saidcylinder againstv said bore, and means for moving said plunger inthe opposite direction only while said cylinder is at rest and when said cylinder port is in full open communication with one of said frame ports.

i 3. In combination, a frame having a ybore v and a plurality of independent fluid distributing ports terminating at said bore, a cylinder rotatably associated with said bore and having a portfornied to establish direct and independent communication between the interior of said cylinder and said frame ports, a valve for controlling admission of fluidto said cylinder through teach of said frame ports, a valve for controlling discharge of fluid from said cylinder through each of said frame ports, a plunger recip,'

rocable within said cylinder, and means for. moving said plunger in opposite directions while said cylindei is at rest to effect actuation of each set of said valves.

4. In combination, a frame, a cylinder rotatably associated with said frame, a gear secured to said cylinder and surrounding Q the axis thereof, a plunger reciprocable -within said cylinder, a rotary shaft. extending transversely across said 'y axis adjacent to saidy gear and an end of said plunger, a cam carried by said-shaft and cooperable with said plunger to move the saine longitudinally of said cylinder, and a member carried by said shaft and having a tooth cooperable with the teeth of saidy gear to intermittently rotate said cylinder.

5. In combination, a frame,` a cylinder rotatably associated with said frame, a gear secured to said cylinder and surrounding the axis thereof, a plunger reciprocable within said l cylinder, a rotary shaft vextending transversely across said axis adjacent to said gear and an end of said plunger, a cam carried by said shaft and cooperablewith saidy t plunger to move the same along said cylinder in one direction, a spring coacting with' said cylinder and with said plunger to move the. latter `in the lopposite direct-ion, and a member carried bysaid shaft and having a tooth cooperable with the teeth of said gear to intermittently rotate said cylinder.

6. In combination, a frame having a bore and a plurality of independent fluid distribution ports terminating directly at said bore, said ports having like circular crosssection at said bore and being spaced apart less than a port diameter, a cylinder rotatably associated with said boreand having a port formed to establish direct and independent communication between the interior of said cylinder and said frame por-ts in succession, a plunger reciprocable within said cylinder, and means for moving said plunger relative to said cylinder only when said cylinder port is in full open communication with one of said frame port-s.

7. In combination, a frame, a plurality of independent fluid distribution lines associated with said frame, a cylinder rotatably associated with said frame and having a port formed to establish independent communication between the interior of said cylinder and said lines, and a pair of alined plungersy movable `longitudinally within said cylinto supply a definite .quantity of fluid to each of said lines in succession and the other being adapted to force said iuid through said lines, and means for varying the quantities of iiuid delivered to said lines by said supply plunger'.

9. In combination, al frame, a plurality of independent fluid distribution lines associated with said frame, a cylinderrotatably associated with said frame and having a port formed to establish independent communication between the interior of-said cylinder and said lines in succession, a pair of alined plungersreciprocable within said cylinder, one of'Y said plungers being effectiveV to supply a quantity of fluid to each of said lines in succession and the other being if adapted to force said fluid through said lines, and means for moving said plungers relative to said cylinder only when said cylinder is at rest and while the port thereof is in 'full open communication with oneY of said lines. y l0.V In combination, a frame', a vplurality of independent fluid'distribution lines associated with said frame, a cylinder rotatably associated with said frame and having a port formed to establish independent coininunication between the interior of said cylindery and said lines in succession, apair of alined plungers reciprocable within said cylinder, oneof said plungers being effective to supply a definite quantity of fluid to each of said lines in succession and the other being adapted to force said fluid through said lines, means for varying the quantities of iuid delivered to said lines by said supply plunger, and means for moving said plungers relative to said cylinder only When said cylinder is at rest and While the port thereof is in full open communication With one of said lines.

In testimony whereof, the signature of the inventor is afiixed hereto.

EUGENE M. SCOVILLE. 

